Test-Run is designed to protect your computer from the hazards of testing new software. It creates a copy of your Registry to use for testing purposes. Double-click the Switch icon toggles between the test Registry and the real one. The test Registry displays special wallpaper, so you wont confuse which Registry is which. After testing, switch back, and all registry values are restored. Test-Run is easy to use and gives ultimate protection to your Registry. Excellent documentation is included.